TPS650240 Datasheet, PDF (6/34 Pages) Texas Instruments – Power Management ICs for Li-Ion Powered Systems

TPS650240
TPS650241
TPS650242
SLVS774 – JUNE 2007
www.ti.com
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, T_A = –40°C to 85°C, typical values are at T_A = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
VDCDC2 STEP-DOWN CONVERTER
V_VINDCDC2
I_O
Input voltage range
Maximum output current for TPS650240 Vo = 2.5 V
and TPS650242
I_O
I_SD
R_DS(ON)
I_LP
R_DS(ON)
I_LN
I_LIMF
Maximum output current for TPS650241 Vo = 2.5 V
Shutdown supply current in VINDCDC2 EN_DCDC2 = GND
P-channel MOSFET on-resistance
P-channel leakage current
VINDCDC2 = V_GS = 3.6 V
VINDCDC2 = 6.0 V
N-channel MOSFET on-resistance
VINDCDC2 = VGS = 3.6 V
N-channel leakage current
V_DS = 6.0 V
Forward current limit (P- and N-channel) 2.5 V < VINDCDC2 < 6.0 V
for TPS650240 and TPS650242
I_LIMF
Forward current limit (P- and N-channel) 2.5 V < VINDCDC2 < 6.0 V
for TPS650241
f_S
VDCDC2
Oscillator frequency
Fixed output voltage
MODE=0 (PWM/PFM)
1.8 V
VINDCDC2 = 2.5 V to 6.0 V; 0 mA ≤ I_O ≤
1.0 A
2.5 V
VINDCDC2 = 3.0 V to 6.0 V; 0 mA ≤ I_O ≤
1.0 A
Fixed output voltage
MODE=1 (PWM)
1.8 V
VINDCDC2 = 2.5 V to 6.0 V; 0 mA ≤ I_O ≤
1.0 A
2.5 V
VINDCDC2 = 3.0 V to 6.0 V; 0 mA ≤ I_O ≤
1.0 A
Adjustable output voltage with resistor VINDCDC2 = VDCDC2 + 0.3V (min 2.5V)
divider at DEFDCDC2 MODE=0 (PWM) to 6.0V; 0 mA ≤ I_O ≤ 1.0 A
Adjustable output voltage with resistor VINDCDC2 = VDCDC2 + 0.3V (min 2.5V)
divider at DEFDCDC2; MODE=1 (PWM) to 6.0V; 0 mA ≤ I_O ≤ 1.0 A
Line Regulation
VINDCDC2 = VDCDC2 + 0.3 V (min. 2.5
V) to
6.0 V; I_O = 10 mA
Load Regulation
I_O = 10 mA to 1.0 A
T_SS
Soft start ramp time
VDCDC2 ramping from 5% to 95% of
target value
R(L2)
Internal resistance from L2 to GND
MIN TYP
2.5
800
1000
0.1
140
150
7
1.05 1.16
1.22 1.35
1.95 2.25
–2%
–2%
–2%
–1%
–2%
–1%
0.0
0.25
750
1
MAX UNIT
6.0 V
mA
mA
1 μA
300 mΩ
2 μA
297 mΩ
10 μA
1.29 A
1.5 A
2.55 MHz
2%
2%
2%
1%
2%
1%
%/V
%/A
μs
MΩ
6
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